"In the morning, it was raining."
Pronoun: it (refers to the weather)
Noun: morning
Verb: was raining (linking verb + present participle)
Preposition: in
"The plateau was dull and gloomy."
Adjectives: dull, gloomy (describe the plateau)
Conjunction: and (connects adjectives)
"I walked beyond the town to look at the weather."
Pronoun: I
Preposition: beyond, at
Infinitive verb: to look